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Author Topic: Honda CB650C Tachometer Ratio?  (Read 471 times)

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anthograham

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Honda CB650C Tachometer Ratio?
« on: June 16, 2021, 12:13:32 PM »
I've seen mixed answers on the web but no source for the answers. Can anyone here definitively tell me (or point me to a resource) what the ratio is for the tachometer?

Thank you.
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Offline david 750f

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Re: Honda CB650C Tachometer Ratio?
« Reply #1 on: June 16, 2021, 06:16:36 PM »
650 and 750 are 4:1 ratio. The rest of the bikes (350,400,500,550) are 20:3 ratio. It's in the FAQ's somewhere.
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1976 CB 750F

Offline Alan F.

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Re: Honda CB650C Tachometer Ratio?
« Reply #2 on: June 16, 2021, 06:23:11 PM »
Found this page a while ago:

https://mostynindustries.com.au/speedo-tacho-ratios

20:3 is sorta close to 7:1 right?
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